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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Cash flows from operating activities    
Net income $ 4,380 $ 2,759
Adjustments to reconcile net income to net cash provided by operating activities:    
Stock-based compensation 12,981 6,586
Depreciation and amortization 1,527 1,701
Deferred income taxes (2,712) (1,593)
Contingent consideration expense 29 0
Change in fair value of contingent consideration 257 0
Loss on impairment of intangible assets 142 0
Foreign currency remeasurement loss 606 1,671
Other non-cash operating expense 0 489
Changes in operating assets and liabilities, net of effects from acquisitions:    
Accounts receivable 497 (1,290)
Unbilled accounts receivable (625) 83
Prepaid expenses and other current assets (1,448) (1,362)
Other non-current assets (693) 444
Accounts payable (678) (181)
Accrued expenses and other current liabilities 4,677 7,313
Deferred revenue 3,645 3,492
Other non-current liabilities 1,330 1,166
Net cash provided by operating activities 23,915 21,278
Cash flows from investing activities    
Purchases of property and equipment; and software (564) (566)
Payments for acquisitions, net of cash acquired (9,818) 0
Purchase of short-term investment (35,099) (15,000)
Sale of short-term investment 15,000 15,000
Payments for security deposits 0 (33)
Net cash used in investing activities (30,481) (599)
Cash flows from financing activities    
Proceeds from exercise of common stock options 4,693 2,600
Net cash provided by financing activities 4,693 2,600
Effect of exchange rate changes on cash and cash equivalents (282) (2,939)
Net (decrease) increase in cash and cash equivalents and restricted cash (2,155) 20,340
Cash and cash equivalents and restricted cash, beginning of the period 86,728 61,094
Cash and cash equivalents and restricted cash, end of the period 84,573 81,434
Supplemental disclosure of cash flow activities    
Cash paid for taxes 483 101
Supplemental disclosure of non-cash operating, investing and financing activities    
Unpaid purchases of property and equipment 297 62
Series A Redeemable Convertible Preferred Stock dividend accretion $ 2,063 $ 1,942